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Updated: May 9, 2026
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Contact Hypersensitivity as a Murine Model of Allergic Contact Dermatitis
Published on: September 26, 2022
Risk factors associated with methylisothiazolinone contact sensitization
Wolfgang Uter1, Johannes Geier, Andrea Bauer
1Department of Medical Informatics, Biometry and Epidemiology, University of Erlangen/Nürnberg, 91054, Erlangen, Germany.
Contact Dermatitis
|July 30, 2013
Summary
Methylisothiazolinone (MI) allergy is rising, particularly in women over 40 using cosmetics. Risk factors include specific occupations and dermatitis types, necessitating regulatory action to reduce MI concentrations.
Area of Science:
- Dermatology
- Allergology
- Toxicology
Background:
- Methylisothiazolinone (MI) is a preservative increasingly recognized as a significant allergen.
- A notable rise in MI sensitization prevalence has been observed in recent years.
Purpose of the Study:
- To identify key risk factors contributing to methylisothiazolinone (MI) sensitization.
- To inform prevention strategies for the growing epidemic of MI allergy.
Main Methods:
- Analysis of contact allergy surveillance data from the Information Network of Departments of Dermatology (IVKD) between 2009 and 2012.
- Inclusion of 28,922 patch tests with MI (500 ppm in water) within a cosmetic preservative series.
- Application of logistic regression to assess risks associated with various factors.
Main Results:
- MI sensitization prevalence increased from 1.94% in 2009 to 6.02% in 2012.
- The rise was primarily linked to female patients aged 40 and older, facial dermatitis, and cosmetic use.
- Occupations like painters and beauticians, and ano-genital dermatitis were identified as additional risk factors.
Conclusions:
- Current usage concentrations of MI in cosmetics and industrial products are excessively high.
- Urgent self-regulatory and governmental actions are required to address the MI sensitization epidemic.
- Methylisothiazolinone (MI) should be incorporated into standard dermatological baseline testing series.
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